These publications can help you install the air
conditioner or heat pump. You can usually find these at
your local library or purchase them directly from the
publisher. Be sure to consult current edition of each
standard.
National Electrical Code ...................... ANSI/NFPA 70
Standard for the Installation .............. ANSI/NFPA 90A
of Air Conditioning and
Ventilating Systems
Standard for Warm Air...................... ANSI/NFPA 90B
Duct Design for Residential .............. ACCA Manual D
Winter and Summer Air
Conditioning and Equipment Selection
NFPANational Fire Protection Association
Batterymarch Park
P.O. Box 9101
Quincy, MA 02269-9901
Telephone: (800) 344-3555
Fax: (617) 984-7057
Manual 2100-353
Page1
GENERAL INSTRUCTIONS
IMPORTANT
The equipment covered in this manual is to be installed
by trained, experienced service and installation
technicians. All duct work, supply and return ducts,
must be properly sized for the design air flow
requirement of the equipment. ACCA is an excellent
guide to proper sizing. All duct work or portions
thereof not in the conditioned space should be properly
insulated in order to both conserve energy and prevent
condensation or moisture damage.
SHIPPING DAMAGE
Upon receipt of equipment, the carton should be
checked for external signs of shipping damage. If
damage is found, the receiving party must contact the
last carrier immediately, preferably in writing,
requesting inspection by the carrier’s agent.
GENERAL
The refrigerant system is completely assembled and
charged. All internal wiring is complete.
The unit is designed for use with or without duct work.
Flanges are provided for attaching the supply and return
ducts.
These instructions explain the recommended method to
install the air cooled self-contained unit and the
electrical wiring connections to the unit.
These instructions and any instructions packaged with
any separate equipment required to make up the entire
heat pump system should be carefully read before
beginning the installation. Note particularly “Starting
Procedure” and any tags and/or labels attached to the
equipment.
While these instructions are intended as a general
recommended guide, they do not supersede any national
and/or local codes in any way. Authorities having
jurisdiction should be consulted before the installation
is made.
FIELD INSTALLED HEATER PACKAGES
(OPTIONAL)
These packaged air conditions are manufactured
without supplementary electric heaters. Supplementary
heaters are available for simple, fast field installation.
A separate power circuit is required for the
supplementary heaters.
IMPORTANT: Refer to Table 1 when designing duct
work for maximum available static pressure with heater
installed.
Refer to data shown in Table 3 and 4 for proper
application information on all available heater
combinations and what units they can be used with. It
also shows the applicable circuit ampacities, fuse size,
and wire size for each heater combination.
S = Standard Application – Heater volts and phase same as basic unit A=Alternate Application – Heater volts and phase different from basic unit.
N = Not Approved
Time Delay fuses of “HACR” type circuit breakers must be used for 60 and smaller sizes. Standard fuses or circuit breakers are suitable for sizes
j
70 and larger. 480V circuit breakers are not “HACR” type.
Based on wire suitable for 75 degree C. Other wiring materials must be rated for marked “Minimum Circuit Ampacity” or greater.
k
Based upon Table 250-95 of N.E.C. 1993. See electric data for basic heat pump for Circuit A wiring specification requirements.
l
IMPORTANT: While this electrical data is presented as a guide, it is important to electrically connect properly sized fuses
and conductor wires in accordance with the National Electrical Code and all existing local codes.
FIGURE 1
DIMENSIONS OF UNITS
MIS-1305
TABLE 5
DIMENSIONS OF UNITS
)sehcnI(gninepOtcuD
ledoM
.oN
ABCJKLMDEFG
)sehcnI(snoisnemiDtenibaClanimoN
egrahcsiDriAnruteR
H
2A4211P
1A4221P
2A0311P
1A0321P
4/1-4261/3-848/1-838/1-628/1-261/961/933633418/7
2A6311P
1A6321P
3A2411P
1A2421P
2A8411P
4/1-130524623 4/3-261/9-7830183618/3-1
2A8421P
1A0601P
Manual 2100-353
Page8
INSTALLATION
LOCATION
GENERAL
The unit must be located outside, or in a well ventilated
area. It must not be in the space being heated or cooled.
A sound absorbing material should be considered if the
unit is to be installed in such a position or location that
might cause transmission of sound or vibration to the
living area or adjacent buildings.
SLAB MOUNTING
In areas where winter temperatures DO NOT go below
32° F for periods over twelve hours, the unit may be
slab mounted at grade level. When installing unit at
grade level, install on a concrete slab at least four
inches above finished grade level. Slab should have a
slope tolerance away from the building structure of at
lease 1/4 inch per foot, while being level from side to
side. Place slab in a location where runoff water from
higher ground will not collect around unit. See
Figure 2.
A minimum of 18 inches should be provided between
the coil inlet and any building surfaces. Provide at least
four feet between coil outlet and any building wall,
fences or other vertical structures. Provide a minimum
of three feet clearance on the service access side of the
unit. See Figure 3.
ROOF MOUNTING
When a unit is installed in areas where low ambient
temperatures or strong winter winds exist, it should be
placed for prevailing winter winds are not in direct line
with the outdoor coil. If this is not possible, a wind
barrier should be constructed. Place barrier 24 inches
from the coil inlet side of the unit and in the direction
of prevailing winds. Size barrier at least the same
height and width as the unit. This may be necessary on
ground level installations, also. See Figure 4.
WINTER INSTALLA TION BELOW 32°F
In areas where winter conditions go below 32°F for
extended periods, the unit must be elevated above the
mounting surface to prevent snowfall or ice
accumulation from interfering with the operation of the
unit. A minimum of twelve inch elevation is
recommended, while greater elevation may be required
for areas of high snow accumulation. Poured concrete,
steel framework, brick, cement block, etc., can be
utilized to construct a suitable raised mounting
platform. See Figure 5.
TYPICAL INSTALLATIONS
1.
ROOF MOUNTED
sturdy base on the roof of the building. Return air
to the unit is brought through a single return grille
(grilles with built-in filters are best since they
enable easy access for filter changing). Return air
ducts are attached to the lower section of the front
panel. Supply air is brought from the unit to attic
duct work or to a furred down hall. Supply air duct
is attached to the top of the front panel.
CAUTION: All outdoor duct work must be
thoroughly insulated and weatherproofed. All
attic duct work must be thoroughly insulated.
Two inch thick insulation with suitable vapor
barrier is recommended for both outdoor and
attic runs.
In roof top installation, as in all installations, the air
conditioner must be level from side to side.
However, the unit should have a pitch along the
length to assure complete external drainage of
precipitation and of defrost condensate. See Figures
6 and 7, and Tables 6 and 7.
2.
CRAWL SPACE
space must be well insulated and provided with a
vapor barrier. In addition, the crawl space must be
thoroughly ventilated and provided with a good
vapor barrier as a ground cover. It is most desirable
to install the unit will be outdoors rather than inside
the crawl space, so that it will be readily accessible
for service.
3.
SLAB MOUNTED AT GROUND LEVEL
type installation is ideal for homes with a slab floor
construction where a roof mounted unit is not
desired. The supply and return duct work can be run
through a furred closet space.
4.
THROUGH THE WALL
requires a suitable framework to be fabricated
capable of withstanding the unit weight. Normally
the unit will be insulated so as to minimize supply
and return duct work.
– The unit is mounted on a
– Duct work installed in crawl
– This type installation
– This
Manual 2100-353
Page9
FIGURE 2
SLAB MOUNTING AT GROUND LEVEL
(Above 32°F Outside Temperature)
FIGURE 3
AIRFLOW AND SERVICE ACCESS CLEARANCES
MIS-1184
Manual 2100-353
Page10
MIS-1185
FIGURE 4
ROOF TOP APPLICATION
(May also be required for ground level installations)
MIS-1176
FIGURE 5
ELEVATED MOUNTING PLATFORMS
MIS-1183
Manual 2100-353
Page11
Manual 2100-353
Page12
FIGURE 6
PREFABRICATED ROOF CURB SPECIFICATIONS
HEAVY GAUGE GALVANIZED WITH WOOD NAILING STRIP, WELDED/LEAKPROOF
A SEPARATE METAL FLASHING SHOULD BE
INSTALLED AROUND WOOD CURBING. CAULK
AND SEAL ALL JOINTS AND WEATHERPROOF.
TABLE 7
DIMENSION FOR X IN FIG. 7
ledoMtinU
dooHfooR
ledoM
noisnemiD
X
2A4211P
1A4221P
2A0311P
1A0321P
63-EHR14
2A6311P
1A6321P
3A2411P
1A2421P
2A8411P
06EHR8/7-44
2A8421P
1A0601P
Manual 2100-353
Page13
5.
OTHER INSTALLATIONS
– Many other
installations are possible with the packaged air
conditioner. No matter what the installation, always
consider the following facts:
A. Insure that the discharge air is not obstructed in
any way so as to cause operation difficulties.
B. The indoor coil drain pan is equipped with a
coupling that must be piped through a
condensate drain trap to a suitable drain.
C. Always mount the unit is such a position that it
may be easily reached for servicing and
maintenance.
D. Insure that the unit is clear so that proper air
flow over the outdoor coil will be maintained.
If this unit is operated in cooling below a 65° outdoor
ambient temperature, the installation of low ambient
controls (CMA-6) to unit is required.
CONDENSATE DRAIN TRAP
It is very important to provide a trap in the condensate
drain line to allow a positive liquid seal in the line and
assure correct drainage from the coil condensate pan.
Install condensate drain trap shown in Figure 8. Use
drain connection size or larger. Do not operate unit
without trap. Unit must be level or slightly inclined
toward drain. With a trap installed on a unit located in
an unconditioned area, water in the trap may freeze. It
is recommended that the trap material be of a type that
will allow for expansion of water when it freezes.
AIR FILTERS
Air filters for the return air side of the system are not
provided as part of these models, and must be field
supplied and installed as part of the final installation.
Prior thought should be given to return air location and
placement of the air filter(s). The air filter(s) must be
of adequate size and readily accessible to the operator
of the equipment. Filters must be adequate in size and
properly maintained for proper operation. If this is not
done, excessive energy use, poor performance, and
multiple service problems will result. It is impossible tooversize air filters. Generous sizing will result in
cleaner air and coils as well as lower operating costs
and extend the time between required changes. Table 8
shows minimum filter areas and recommended filter
sizes. Actual filter sizes can vary with the installation
due to single or multiple returns utilizing a filter/grille
arrangement or being placed immediately ahead of the
indoor coil face in the return air duct.
TABLE 8
FILTER REQUIREMENTS & SIZES
.oNledoMaerAretliFmuminiM
2A4211P
1A4221P
2A0311P
1A0321P
2A6311P
1A6321P
3A2411P
1A2421P
2A8411P
2A8421P
1A0601P
sehcnIerauqS264
)teeFerauqS12.3(
sehcnIerauqS806
)teeFerauqS26.4(
eziS
1x8/5-03x51
1x02x61)2(
NOTE: If roof hood accessory is to be used,
information on air filters may be found under
that heading in this manual. Air filters are
supplied as part of that package.
dednemmoceR
Manual 2100-353
Page14
FIGURE 8
CONDENSATE DRAIN TRAP
MIS-136
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mumixaM
ecnatsiD
teeFnI
553.2
02
81
61
41
21
54
06
001
061
052
WIRING – MAIN POWER
Refer to the unit rating plate for wire sizing information
and maximum fuse size. Each outdoor unit is marked
with a “Minimum Circuit Ampacity”. This means that
the field wiring used must be sized to carry that amount
of current. If field installed heaters are added to the
basic unit, a second separate power supply circuit will
be required. The heater rating plate located adjacent to
the basic unit rating plate will show the appropriate
circuit ampacity fuse size, etc. (Also see “Electrical
Specifications” on pages 3, 4 and 5.) All models aresuitable for connection with copper wire only. These
instructions must be adhered to. Refer to the National
Electrical Code for complete current carrying capacity
data on the various insulation grades of wiring material.
The electrical specifications list fuse and wire sizes
(75°F copper) for all models including the most
commonly used heater sizes.
The unit rating plate lists a “Maximum Time Delay
Fuse” or “HACR” type circuit breaker that is to be used
with the equipment. The correct size must be used for
proper circuit protection and also to assure that there
will be no nuisance tripping due to the momentary high
starting current of the compressor.
WIRING – 24V LOW VOLTAGE CONTROL
CIRCUIT
Five (5) wires should be run from thermostat subbase to
the 24V terminal board in the unit. A five conductor,
18 gauge copper, color-coded thermostat cable is
recommended. The connection points are shown in
Figure 9.
TABLE 9
THERMOSTAT WIRE SIZE
TRANSFORMER TAPS
230/208V, 1 phase and 3 phase equipment employ dual
primary voltage transformers. All equipment leaves the
factory wired on 240V tap. For 208V operation,
reconnect from 240V to 208V tap. The acceptable
operating voltage range for the 240 and 208V taps are:
TAP RANGE
240253 – 216
208220 – 187
NOTE: The voltage should be measured at the field
power connection point in the unit and while
the unit is operating at full load (maximum
amperage operating condition).
THERMOSTATS
See specific wiring information for the different models, heater KWs, and voltages on unit and heating wiring
diagrams..
IMPORTANT NOTE:Only the thermostat and subbase combinations as shown above will work with this
TABLE 10
WALL THERMOSTAT AND SUBBASE COMBINATIONS
tatsomrehTesabbuSserutaeFtnanimoderP
220-3048
1113F78T
140-3048
9941C4308T
940-3048
083-39F1
340-3048
002MC
840-3048
3131C0048T
910-3048
0671C478T
equipment. The thermostat and subbase MUST be matched, and correct operation can be assured only
by proper selection and application of these parts.
300-3048
0221A935Q
——
——
——
——
210-4048
0671C476Q
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elbammargorPcinortcelE
yrucreM,loocegats1,taehegats1
otua-no:naFlooc-ffo-taeH:metsyS
yrucreM,loocegats1,taehegats1
otua-no:naFlooc-ffo-taeH:metsyS
yrucreM,loocegats1,taehegats1
noitcApanSotua-no:naFlooc-ffo-taeH:metsyS
yrucreM,loocegats1,taehegats1
otua-no:naFlooc-ffo-taeH:metsyS
elbammargorP-noNcinortcelE
yrucreM,loocegats1,taehegats1
otua-no:naFlooc-otua-taeH:metsyS
Manual 2100-353
Page15
FIGURE 9
LOW VOLTAGE WIRING
Manual 2100-353
Page16
MIS-1180
START UP AND OPERATION
THREE PHASE SCROLL COMPRESSOR
START UP INFORMATION
Scroll compressors, like several other types of
compressors, will only compress in one rotational
direction. Direction of rotation is not an issue with
single phase compressors since they will always start
and run in the proper direction.
However, three phase compressors will rotate in either
direction depending upon phasing of the power. Since
there is a 50-50 chance of connecting power in such a
way as to cause rotation in the reverse direction,
verification of proper rotation must be made.
Verification of proper rotation direction is made by
observing that suction pressure drops and discharge
pressure rises when the compressor is energized.
Reverse rotation also results in an elevated sound level
over that with correct rotation, as well as, substantially
reduced current draw compared to tabulated values.
Verification of proper rotation must be made at the
time the equipment is put into service. If improper
rotation is corrected at this time there will be no
negative impact on the durability of the compressor.
However, reverse operation for over one hour may have
a negative impact on the bearing due to oil pump out.
NOTE: If compressor is allowed to run in reverse
rotation for several minutes the compressor’s
internal protector will trip.
All three phase ZR*3 compressors are wired identically
internally. As a result, once the correct phasing is
determined for a specific system or installation,
connecting properly phased power leads to the same
Fusite terminals should maintain proper rotation
direction.
The direction of rotation of the motor may be changed
by reversing any two line connections to the unit.
SEQUENCE OF OPERATION
COOLING
in compressor contactor starting the compressor and
outdoor motor. The G (indoor motor) circuit is
automatically completed on any call for cooling
operation, or can be energized by manual fan switch on
subbase for constant air circulation.
HEATING
heating cycle energizing electric heat if so equipped.
– Circuit R-Y makes at thermostat pulling
– A circuit R-W1 is completed on each
START UP NOTES
For improved start up performance, wash the indoor
coil with dishwasher detergent.
INDOOR BLOWER MOTOR
Some models feature a variable speed (ECM) motor
providing high efficiency, low sound levels and soft
start capabilities. The motor is self adjusting to provide
the proper air flow rate at duct static pressures up to
0.50” WC without user adjustment or wiring changes.
On command from the wall thermostat the motor will
start slowly and ramp up to full speed over a period of
10- 15 seconds.
When the thermostat is satisfied the blower will operate
for approximately 1 minute, and then slow down and
stop.
COMPRESSOR CONTROL MODULE
The compressor control is an anti-short cycle/lockout
timer with high and low pressure switch monitoring and
alarm output.
ADJUSTABLE DELAY-ON-MAKE AND BREAK
TIMER
On a call for compressor operation the delay-on-make
period begins which will be 10% of the delay-on-break
setting. When the delay-on-make is complete and the
high pressure switch (and low pressure switch if
employed) is closed, the compressor contactor is
energized. Upon shutdown the delay-on-break timer
starts and prevents restart until the delay-on-break and
delay-on-make periods have expired.
HIGH PRESSURE SWITCH AND LOCKOUT
SEQUENCE (Standard Feature)
If the high pressure switch opens, the compressor
contactor will de-energize immediately. The lockout
timer will go into a soft lockout and stay in soft lockout
until the high pressure switch closes and the delay-onmake time has expired. If the high pressure switch
opens again in this same operating cycle the unit will go
into manual lockout condition and the alarm circuit will
energize. Recycling the wall thermostat resets the
manual lockout.
Manual 2100-353
Page17
LOW PRESSURE SWITCH, BYPASS, AND
LOCKOUT SEQUENCE
NOTE: The low pressure switch is an optional control
and the bypass and lockout sequence are part
of the standard compressor control module.
If the low pressure switch opens for more that 120
seconds, the compressor contactor will de-energize and
go into a soft lockout. Regardless the state of the low
pressure switch, the contactor will reenergize after the
delay-on-make time delay has expired. If the low
pressure switch remains open or opens again for longer
than 120 seconds the unit will go into manual lockout
condition and the alarm circuit will energize. Recycling
the wall thermostat resets the manual lockout.
.
ALARM OUTPUT
Alarm terminal is output connection for applications
where alarm signal is desired. This terminal is powered
whenever compressor is locked out due to HPC or LPC
sequences as described.
NOTE: Both high and low pressure switch controls are
inherently automatic reset devices. The high
pressure switch and low pressure switch cut
out and cut in settings are fixed by specific air
conditioner or heat pump unit model. The
lockout features, both soft and manual, are a
function of the Compressor Control Module.
ADJUSTMENTS
ADJUSTABLE DELAY-ON-MAKE AND
DELAY-ON-BREAK TIMER
The potentiometer is used to select Delay-on-Break time
from 30 seconds to 5 minutes. Delay-on-Make (DOM)
timing on power-up and after power interruptions is
equal to 2 minutes plus 10% of Delay-on-Break (DOB)
setting:
0.5 minute (30 seconds) DOB = 123 second DOM
1.0 minute (60 seconds) DOB = 126 second DOM
2.0 minute (120 seconds) DOB = 132 second DOM
3.0 minute (160 seconds) DOB = 138 second DOM
4.0 minute (240 seconds) DOB = 144 second DOM
5.0 minute (300 seconds) DOB = 150 second DOM
Manual 2100-353
Page18
SERVICE AND TROUBLESHOOTING
SERVICE HINTS
1. Caution homeowner to maintain clean air filters at
all times. Also, not to needlessly close off supply
and return air registers. This reduces air flow
through the system which shortens equipment
service life as well as increasing operating costs.
2. Check all power fuses or circuit breakers to be sure
that they are the correct rating.
3. Periodic cleaning of the outdoor coil to permit full
and unrestricted airflow circulation is essential.
PRESSURE SERVICE PORTS
High and low pressure service ports are installed on all
units so that the system operating pressures can be
observed. Pressure tables can be found later in this
manual covering all models on cooling cycle. It is
imperative to match the correct pressure table to the
unit by model number.
REFRIGERANT CHARGE
The correct system R-22 charge is shown on the unit
rating plate. Optimum unit performance will occur
with a refrigerant charge resulting in a suction line
temperature (6” from compressor) as shown in
Table 11.
FAN BLADE SETTINGS
Shown in Figure 10 are the correct fan blade setting
dimensions for proper air delivery across the outdoor
coil.
Any service work requiring removal or adjustment in
the fan and/or motor area will require that the
dimensions below be checked and blade adjusted in or
out on the motor shaft accordingly.
FIGURE 10
FAN BLADE SETTING
TABLE 11
SUCTION LINE TEMPERATURES
detaR
ledoM
2A4211P00885-6556-36
1A4221P00885-6556-36
2A0311P521185-6556-36
1A0321P000185-6556-36
2A6311P052195-7506-85
1A6321P001195-7506-85
3A2411P004195-7506-85
1A2421P004195-7506-85
2A8411P055175-4506-85
2A8421P055155-3585-65
1A0601P007194-7465-45
The above suction line temperatures are based upon
80°F dry bulb/67°F wet bulb (50% RH) temperature and
rated airflow across the evaporator during cooling cycle.
wolfriA
DO°59
erutarepmeT
DO°28
erutarepmeT
FAN BLADE SETTING DIMENSIONS
TABLE 12
ledoM"A"noisnemiD
2A4211P"00.1
1A4221P"00.1
2A0311P"57.
1A0321P"00.1
2A6311P"00.1
1A6321P"00.1
3A2411P"57.1
1A2421P"57.1
2A8411P"57.1
2A8421P"57.1
1A0601P"57.1
Manual 2100-353
Page19
SUCTION AND DISCHARGE TUBE
BRAZING
Compliant Scroll compressors have copper plated steel
suction and discharge tubes. These tubes are far more
rugged and less prone to leaks than copper tubes used
on other compressors. Due to different thermal
properties of steel and copper, brazing procedures may
have to be changed from those commonly used.
•
To disconnect: heat joint Areas 2 and 3 slowly and
uniformly until braze material softens and the tube
can be pulled out of suction fitting. (See Figure 10.)
•
To connect:
– Recommended brazing materials: silfos with
minimum 5% silver or silver braze material with
flux.
BRAZING DIAGRAM
– Reinsert tube into fitting.
– Heat tube uniformly in Area 1 moving slowly to
Area 2. When joint reaches brazing
temperature, apply brazing material. (See
Figure 11)
Disconnect power from unit before removing or replacing connectors, or servicing motor. Wait at
least 5 minutes after disconnection power before opening motor.